Question: Are those sentences correct and natural:

1 & 3 are correct.
2 & 4 are incorrect because you must use the infinitive for imperative sentences:
2) Huwag mong tingnan ako! = Don't look at me!
4) Huwag kang tumingin sa akin! = Don't look at me!

@leosmith Thanks a lot.
I think 4 comes from this site .🙂

@pj1506
edit: I see I'm wrong. Apparently it is also acceptable to use contemplated aspect with huwag:
Huwag kang kumain. = Huwag kang kakain. = Don't eat.
Source: learningtagalog.com/ grammar/verbs/comman ds_requests_and_wish es/huwag.htmlPersonally, I will stick with the infinitive when I talk, because I like to think of huwag as a pseudo verb and pseudo verbs require the infinitive in this type of construction. Huwag appears to be an exception.

"Huwag mong titingnan ako ”This is incorrect. Huwag mo akong titingnan is the correct sentence

@Bituingmaykinang
Thanks a lot !
Tingnan mo ako ! (goal f.)
Huwag mo akong tingnan !
Huwag mo akong titingnan ! Tumingin ka sa akin !  (-um-)
Huwag kang tumingin sa akin !
Huwag kang titingin sa akin !

@pj1506 Tingnán mo ako ! (√)Huwag mong titingnan ako ! (X)
Huwag mo akong titingnan! (√)

Tumingín ka sa akin ! (√)Huwag kang titingín sa akin ! (√)
Huwag kang tumingin sa akin (√)For 'Huwag kang sentences', both the infinitive (to + verb) and contemplated forms are correct.Example:Don't shout !
Huwag kang SISIGAW ! (contemplated)
Huwag kang SUMIGAW!
(infinitive)

@pj1506
Question: Are those sentences correct?

The first sentence "Tingnan mo ako" is definitely correct. This points out the pattern: Infinitive + Non-Focus Pronoun (mo) + Focus Pronoun (ako).The second sentence "Huwag mong titingnan ako" is incorrect because it does not indicate the proper order of words in a sentence. Filipino language is just like other languages which follows a certain pattern of putting words in order to convey a clear message. With that being said, the correct sentence should be "Huwag mo akong titingnan". Here, it does follow the pattern "Huwag + Non-Focus Pronoun (without any linker like ng) + Focus Pronoun (with the help of a linking word like ng) + (Object) Focus Verb.The two remaining sentences are both correct since they indicate the proper order of words and of course they both convey a clear message based on the standards of Filipino.

Maraming salamat po ! 

@pj1506 Wala pong anuman! 😊